Have you ever wondered how we *really* know what’s at the center of the Earth? Thanks to some amazing scientific insights, we know a lot about the interior of our planet – even though we’ve never even made it through the crust. Join Hank Green for a new geological episode of SciShow!
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Kevin Bealer, KatieMarie Magnone, D.A. Noe, Charles Southerland, Eric Jensen, Christopher R Boucher, Alex Hackman, Matt Curls, Adam Brainard, Scott Satovsky Jr, Sam Buck, Avi Yashchin, Ron Kakar, Chris Peters, Kevin Carpentier, Patrick D. Ashmore, Piya Shedden, Sam Lutfi, charles george, Greg